That is the question. A large part of carry is deciding when, or if, to shoot. A large part of this is having to make the right decision within a very short time frame - fractions of a second sometimes, and the wrong decision can get you killed or jailed. Many people who have little to no experience with such encounters will make the wrong decision. And even those who have experience may make the wrong decision. Training helps, but isn't enough by itself and if there is an encounter where a decision must be made, no one has the time to run thru all the legal mumbo jumbo in their head. More often than not your rat brain takes over and it's pure survival instinct. I've been in this situation more than once, and I cannot predict what my decision might be the next time (if there is one) so I do my best to avoid having to make such a decision.